1 files changed, 3 insertions, 2 deletions
diff --git a/activesupport/lib/active_support/message_verifier.rb b/activesupport/lib/active_support/message_verifier.rb
index a35d5980fe..8e6e1dcfeb 100644
--- a/activesupport/lib/active_support/message_verifier.rb
+++ b/activesupport/lib/active_support/message_verifier.rb
@@ -39,8 +39,9 @@ module ActiveSupport
       if data.present? && digest.present? && secure_compare(digest, generate_digest(data))
         begin
           @serializer.load(::Base64.strict_decode64(data))
-        rescue ArgumentError
-          raise InvalidSignature
+        rescue ArgumentError => argument_error
+          raise InvalidSignature if argument_error.message =~ %r{invalid base64}
+          raise
         end
       else
         raise InvalidSignature